package com.yoda.interceptor;


import com.yoda.context.BaseContext;
import com.yoda.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {


    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源

        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
		//获取登录数据员工id
        String token = request.getHeader("token");

        Claims claimsBody = JwtUtil.getClaimsBody(token);
        int i = JwtUtil.verifyToken(claimsBody);
        if(i==-1 || i==0){
            //通过token令牌解析 载荷 获取id
            String id = claimsBody.get("id").toString();
            Long getId = Long.valueOf(id);
            if (getId!=null){
                BaseContext.setCurrentId(getId);
            }
            //-1：有效，0：有效，1：过期，2：过期
            return true;
        }else{
			//否则，发送未认证错误信息
			response.setStatus(401);
            return false;
        }
    }
}
